无
*注意事项:
3.6×1.013.6 2.7÷0.82.7 4.9×0.984.9
2.47÷1.12.47 3.8÷3.81 0.98×0.90.9
12×2.5= 7.5 ×0.4 = 1 ÷0.625 = 8.4÷4.2=
3.8÷0.19= 0.25×8 = 12.5÷2.5= 25+2.5×3 =
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